System and method for reducing engine noise

DETAILED DESCRIPTION In the following detailed description, certain specific terminology is used for clarity purposes and for describing a particular embodiment of the system.
However, the particular embodiment is not intended to be limiting and should not be so construed since other embodiments may take different forms that are within the scope of the claims.
As described above, the inventor has determined that noises and sounds propagate through air in the air induction system, which draws air into the engine.
As shown in FIG.
1, an air duct housing 10 is configured as a curved wall, smoothly convergent main air duct housing section 12 having a small diameter end adapted to be connected to the intake manifold of an internal combustion engine 14.
An auxiliary transition section 16 may also be included, which has a divergent shape having its large end attached to or otherwise associated with a large diameter end of the main air duct housing section 12 by tabs 19 axially projecting from an outer rim 21 of a generally circular (round or oval) frame 18 attached to or otherwise associated with both structures.
The transition section 16 provides convenient connection to the upstream air induction system components 20, such as the air cleaner, etc.
A speaker enclosure or assembly 22 is supported within the large end of the main air duct housing section 12 by a series of tabs 21 projecting from an inner rim 24 of frame 18.
The speaker enclosure 22 has a curved outer perimeter, generally shaped to follow the inner contour of the large end of the main air duct housing section 12 so as to define a surrounding, annular air flow space 26 between the interior of the section 12 and the exterior of the enclosure 22.
The duct section 12 and speaker enclosure 22 may take various appropriate forms, including circular and oval shapes.
The frame 18 shown in FIG.
2 has four equally spaced radial bars 28 supporting the inner rim 24 so as to allow adequate air flow into the annular space 26 from the transition section 16